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Open Middle @openmiddle

Challenging math problems worth solving. Check out our online workshop (grts.ws/om) and book (grts.ws/omm) by @robertkaplinsky.

Joined February 2014
  • Tweets 856
  • Following 7,706
  • Followers 28,507
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Open Middle@openmiddle
15 May 2025
Open Middle embedded problems let you make a warm-up in 30 seconds. See how at openmiddle.com. #openmiddlemath #openmiddle #mathteacher #teacher #math #education #edu #matheducation #productivestruggle #learning
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Open Middle retweeted
Robert Kaplinsky@robertkaplinsky
May 19
I have created lots of video sharing @openmiddle problems using a lightboard on Instagram and TikTok. Here's an example. I'd appreciate you following me there as I'm not using Twitter as often anymore. Instagram: instagram.com/robert_kaplins… TikTok: tiktok.com/@robertkaplinsky
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Hey teachers and educators! We just added 21 new problems to Open Middle, many of which are for High School. Check them out at openmiddle.com

Open Middle - Challenging math problems worth solving

Open Middle offers interactive math problems designed to foster critical thinking. Explore unique challenges that boost problem-solving skills and creativity.

openmiddle.com
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You can now use Advanced Search on openmiddle.com to find problems faster. You can find Advanced Search by clicking the "Advanced Search" link directly under the main search box.
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Algebra teachers, check out these three rational exponent problems from Bryan Anderson. See the hints and answers on Open Middle: openmiddle.com/rational-expo… openmiddle.com/rational-expo… openmiddle.com/rational-expo…
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This quote from HamiltonHeroes shows how students can't get enough Open Middle problems. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Help your students think deeply about radicals with this Open Middle problem from Phillip Haislip-Hansberry. openmiddle.com/comparing-and…
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This quote from Kate Hayes shows how Open Middle problems lead to deeper conversations. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Are your students working on parallel and perpendicular lines? Try out these two Open Middle problems from Bryan Anderson: openmiddle.com/equations-of-… openmiddle.com/equations-of-…
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This quote from Kori Dale shows how Open Middle problems let students build off from their mistakes, and grow. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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If your students are learning about perpendicular lines, try out this Open Middle problem from Andy Schwen with them: openmiddle.com/perpendicular…
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We are collecting feedback from teachers and educators who use Open Middle problems. Please take a few minutes to complete the form below. Your feedback will help us improve Open Middle. forms.gle/LdbgVYFoUinMfXm1A

Open Middle Feedback

Please give feedback on our website and problems! This form is for educators only, and is not intended for students to fill out.

docs.google.com
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This quote from Marty Joyce shows how Open Middle problems get everyone talking - even those who don't usually. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Want to challenge your Geometry students to find the area of triangles? Try out this Open Middle problem from Dan Wulf. openmiddle.com/area-of-three…
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This quote from a student shows how Open Middle problems resonate with students. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Here's a challenging Open Middle problem to help students develop conceptual understanding of quadratics in standard form: openmiddle.com/maximum-value…
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This quote from MiddleWeb shows how Open Middle problems give you X-ray vision that you otherwise wouldn't have. #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Here's a matrix multiplication problem from Bryan Anderson that will help you bring out their conceptual understanding. See hints and answers on Open Middle. openmiddle.com/matrix-multip…
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This quote from Caitlin Tucker demonstrates how Open Middle problems help students find math fun! #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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Are your students working on radical equations? This Open Middle problem from Jonathan Newman will challenge their understandings! openmiddle.com/radical-equat…
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This quote from Cory Rawlins is an amazing situation to be in - where students want to do more problems! #iteachmath #teacher #teachers #teacherlife #math #mathteacher #matheducation #openmiddlemath #openmiddle #learning #criticalthinking #teacherhacks #teacherhack #edu
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